Vegetables · Food guide
Can dogs eat tomatoes?
Only ripe, red ones, and only in small amounts. Green tomatoes and the green parts of the plant contain solanine, which is toxic to dogs.
Not a substitute for advice from your vetUpdated Sep 26, 2026
AI imageHow much tomatoes can your dog have?
As a snack, the 10% rule applies. As part of a balanced meal, the amount depends on the whole feeding plan.
No single food covers all nutrients.
Set your dog's ideal weight.
As a snack, no more than a day. That's .
Daily energy needs calculated the same way as in the Kahuno app.
The 10% limit applies to snacks and treats according to WSAVA, not to meals.Yellow: this amount is only a guideline. Keep the restrictions below in mind.
What's in tomatoes?
Composition per 100 g
Energy and macros
| Energy | 22 kcal |
| Protein | 1 g |
| Fat | 0.1 g |
| Carbohydrates | 3.3 g |
| Fiber | 1.3 g |
| Water | 94.4 g |
Minerals
| Calcium | 10 mg |
| Phosphorus | 22 mg |
| Ca : P ⓘ | 0.46 : 1 |
| Sodium | 4 mg |
| Potassium | 239 mg |
| Magnesium | 12 mg |
| Iron | 0.2 mg |
| Zinc | 0.1 mg |
| Copper | 40 µg |
| Iodine | 2 µg |
Vitamins and fatty acids
| Vitamin A | 103 µg RE |
| Vitamin D | 0 µg |
| Vitamin E | 0.9 mg |
| Linoleic acid | 0.04 g |
| Omega-3 | 0.01 g |
| EPA | 0 g |
| DHA | 0 g |
Source: Max Rubner-Institut. (2025). Bundeslebensmittelschlüssel (BLS), Version 4.0 — Deutsche Nährstoffdatenbank. doi.org
Composition per 100 g
Energy and macros
| Energy | 22 kcal |
| Protein | 1 g |
| Fat | 0.1 g |
| Carbohydrates | 3.4 g |
| Fiber | 1.4 g |
| Water | 94.4 g |
Minerals
| Calcium | 11 mg |
| Phosphorus | 23 mg |
| Ca : P ⓘ | 0.48 : 1 |
| Sodium | 3 mg |
| Potassium | 139 mg |
| Magnesium | 8 mg |
| Iron | 0.2 mg |
| Zinc | 0.1 mg |
| Copper | 44 µg |
| Iodine | 2 µg |
Vitamins and fatty acids
| Vitamin A | 108 µg RE |
| Vitamin D | 0 µg |
| Vitamin E | 1 mg |
| Linoleic acid | 0.04 g |
| Omega-3 | 0.01 g |
| EPA | 0 g |
| DHA | 0 g |
Source: Max Rubner-Institut. (2025). Bundeslebensmittelschlüssel (BLS), Version 4.0 — Deutsche Nährstoffdatenbank. doi.org
Key facts at a glance
What's good
- Low in calories, high in water
- Ripe tomatoes provide potassium
What to watch out for
- Never feed green, unripe tomatoes
- Remove the stem end, leaves and vines, and don't let your dog nibble on the plants in the garden either
- The acidity can irritate sensitive stomachs
- No tomato sauce and no ketchup: onions, garlic, salt, sugar
How to feed tomatoes the right way
- 1Only use fully ripe, red tomatoes
- 2Cut out the green stem end generously
- 3Cooked is often easier to digest than raw
- 4Start with a small piece
Safety rating for each dog
Can Romeo handle tomatoes?
This page applies to dogs in general. In Kahuno, you add intolerances to the dog profile, and every ingredient gets a color-coded dot when you log it, checked for your dog specifically. Whoever feeds the dog in your household sees it right away.
Frequently asked questions
Are tomatoes toxic to dogs?
Ripe, red tomatoes aren't toxic in small amounts. Green tomatoes and the green parts of the plant are toxic because they contain solanine.
What should I do if my dog ate green tomatoes?
Call your vet and tell them roughly how much your dog ate. Typical signs are vomiting, diarrhea, drooling and lethargy.
Can dogs eat tomato sauce?
Store-bought sauces almost always contain onions, garlic and salt.
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